Question: Why are some Newman Roller Frames blue and others silver?Answer:The silver frames are MZX-UL models, which are for manual presses. The MZX-UL is also smaller in diameter at 1-7/16-inch. The blue frames are M3-UL Models for automatic presses and have a diameter of 1-5/8-inch. You may find some older “used” frames where the smaller…

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